Icon for a portion of a display screen



The FIGURE is a front view of an icon for a portion of a display screen showing our new design.

The broken line showing the portion of the display screen is for the purpose of illustrating environmental structure and forms not part of the claimed design. The broken line showing a region of the icon and the area there within is for the purpose of illustrating unclaimed portions and forms no part of the claimed design. 

The ornamental design for an icon for a portion of a display screen, as shown and described. 